Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Date | Thu, 22 Aug 2019 18:24:07 -0300 | Subject | Re: [PATCH] Fixes hang in zstd compression test by changing the source of random data. |
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Em Thu, Aug 22, 2019 at 01:55:15PM +0000, James Clark escreveu: > Running 'perf test' with zstd compression linked will hang at the test > 'Zstd perf.data compression/decompression' because /dev/random blocks > reads until there is enough entropy. This means that the test will > appear to never complete unless the mouse is continually moved while > running it.
message came mangled, had to do it by hand and then hook up your header so as to get the correct date, attribution, etc, please check Documentation/process/email-clients.rst,
- Arnaldo > Signed-off-by: James Clark <james.clark@arm.com> > --- > tools/perf/tests/shell/record+zstd_comp_decomp.sh | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/tests/shell/record+zstd_comp_decomp.sh b/tools/perf/tests/shell/record+zstd_comp_decomp.sh > index 899604d1..63a91ec 100755 > --- a/tools/perf/tests/shell/record+zstd_comp_decomp.sh > +++ b/tools/perf/tests/shell/record+zstd_comp_decomp.sh > @@ -13,7 +13,7 @@ skip_if_no_z_record() { > collect_z_record() { > echo "Collecting compressed record file:" > $perf_tool record -o $trace_file -g -z -F 5000 -- \ > - dd count=500 if=/dev/random of=/dev/null > + dd count=500 if=/dev/urandom of=/dev/null > } > > check_compressed_stats() { > -- > 2.7.4 >
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- Arnaldo
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